Time fuse for projectiles



Dec. 11, 1934. A. VARAUD 1,934,093

TIME FUSE FOR PROJECTILES Filed Aug. 30, 1933 I6 I 5 Y P AP 7 7 .D Van/far.

Patented es. 1 1, 1934 j T Q *1,9s4,q98 TIME FUSE; FOR. IPR'OJEC'I'ILES Andre Varaud, o en, Switzerland Application August 30, 1933; Serial No. 687,517

1 In Switzerland SeptembenlO, 1932 I 6 claims." (c1."i02--3e) M e V V The invention relatesto a device for locking which two corresponding groups of centrifugal the timing position of the drivingmemberpf weights would co-loperate. I j the timing means in a mechanical fuse for pro- In the example illustrated these weights are jectiles. g I two in number, but it. is evident that several The annexed drawing illustrates by way of pairs could be used or further that an odd hum- 5' example a form of construction of the invenber thereof could-be used the minimum number, tion. r e l e of weights being besides inred only byreasons Fig. 1 is an axial, sectionfof theimproved fuse of equilibrium, so that the case ofha single and Fig. 2 is a section on line IIII of Fig. 1 weight may also be; contemplated, if care is M andshows' the locking device in plan. 1, g taken to provide such an arrangement of the 10 In the fuse represented, the timing is effect-. masses of the whole devicealtogether, that baled in known manner by winding the spring ance will bemaintained. v of the clockwork vmovement partly illustrated Irrorder to avoid a possible irregularity of in the lower part of Fig. 1, this being effected the width' of one of the teeth luwhich; for

by rotating the cap 1 by means of a key which that reason, will have to be selected of very 15 rotatory movement is transmitted to the clocksmall pitch, a number of teethcan'be provided work movement by means of the central shaft W a CO B D numbel'flnd alTaIlgement 2, which terminates in a key 3 engaging in a of weights so that when the tooth of one of the corresponding rectangular opening'of a disc 4 weights completely enters one of the intervals which in turn acts on the members to be'driven. between the teeth 10, the teeth of the one or 20 In the example represented the disc 4 is more other weights are mo e 0 es coupled to a second disc, 5 and possesses two geredfrom this ideal position of complete enlugs 6, extending horizontally above the disc ga t- 5 and at a certain distance from the latter. The springs 12 need not necessarily be plate- These lugs 6 together with the disc 5 are p but Could be Spiral Springs 01 any other 25 traversed bypins '7 serving as pivotal axes for elastic members capable of bringing back th centrifugal rockers or weights. 8 each provided centrifugal weights towards the centre. with a tooth 9 adaptedto engagewith an in- What I claim a y invention d desire to teriorly toothed crown formedinside the body 8801116 y Letters Patent 0f the U ed States 3011 of the fuse. e is:-

Springs 12 acting on an extension 13 of the 1. In a time fuse for projectiles, a hollow body rockers or Weights 8 hold the latter in their pomember having teeth formed on the interior sition nearest the center, which position they thereof, a driving member in said body mounted will tend to leave under the effectof the min for rotation relative to said body member, a

trifugal force set up on the firing of the procentrifugally actuated element carried by said 35 jectile. driving member, and means carried by said -In fact, from the moment that a rotatory m nt adap to n e h eeth within movement is communicated to the projectile, Said body member p actuation 0f id the rockers or weights 8 pivoting about the pins element by centrifugal force due to rotation of 7, will apply their respective teeth 9 against said pi j fi ed- 40 the teeth 10 and will thus lock the discs 5, 6, 2. In a time fuse for p oj a ow b y therefore also the timing members against a, member having teeth formed on the interior tendency to be displaced with respect to the thereof, a'd v member in a d body mounted. body of the fuse in the direction of the arrow for rotation relative to said body member, a

14, Thi dir ti i d termined, as appears centrifugally actuated element carried by said 45 from the drawing, by the direction of the .indriving me means ed by d eleme t clination of the teeth 19, which should be such adapted to engage the teeth within said body as to oppose the eifect of'irregular action which member upon the actuation of said element by c it is desired to prevent. centrifugal force due to rotation of said projec- Instead of-using inclined teeth, upright teeth tile when fired, and resilient means actin 011 50 could be used which would have the effect of said element tending to maintain the means providing a locking action in both possible dicarried thereby out of engagement with the rections of rotation. Such locking in both diteeth in said body. rections can also be obtained by providing two 3. In a time. fuse o p j i a low b dy sets of inclined teeth of opposite direction with member having teeth formed on the interior 55 locking engagement with the teeth in said body." 4. In a time fuse for projectiles, ahollowbody',

member having teeth formed on the interior thereof, a driving member in said body mounted for rotation relative to said body member, centrifugally actuated elements carried 'by said driving member, and means carried by said elements adapted to engage the teeth within said body member upon the actuation of said elements by centrifugal force due to rotation of said projectile when fired, said elements being so positioned about said driving member that when the means carried by one element is in looking engagement between two teeth of said body anotherof said means is approaching a similar position between two other teeth.-

5. In a time fuse for projectiles, a hollow body member having teeth formed on the interior thereof, a driving member in said body mounted for rotation relative to said body member, centrifugally actuated elements carried by said driving member, means carried by said elements adapted toengage the teeth within said body member upon the actuation of said elements by centrifugal force due to rotation of said projectile when fired, and resilient means acting on said element tending to maintain the means carried thereby out of engagement with the teeth in said body, said elements being so positioned about said driving member that when the means carried by one element is in looking engagement between the teeth of said body another of said'means is approaching a similar position between two other teeth.

' 6. In a time fuse for projectiles, a hollow body member having teeth formed on the interior thereof, a driving member in said body mounted for rotation relative to said body member, a plurality of weighted arms pivoted to said driving member and provided with means to engage the teeth provided in said body to lock the driving member to said body against relative rotation in at least one direction, a spring urging each arm to a position out ofengagement with said body, said arms being susceptible to the action of centrifugal force created by rotation of the projectile when fired to overcome the action of said springs and to move into locking engagement with the teeth in said body, said arms being spaced about said driving member so that when the means carried by one arm is in looking position between two teeth, the means carried by another armis approaching locking position between two other teeth.

ANDRE VARAUD. 

